Angel Moroni to Joseph

"Behold, I will reveal unto you the Priesthood, by the hand of Elijah the prophet, before the coming of the great and dreadful day of the Lord.  And he shall plant in the hearts of the children the promises made to the fathers, and the hearts of the children shall turn to their fathers.  If it were not so, the whole earth would be utterly wasted at his coming." (Moroni, D&C 2)

Christ quotes Malachi to the Nephites

"For behold, the day cometh that shall burn as an oven; and all the proud, yea, and all that do wickedly, shall be stubble; and the day that cometh shall burn them up, saith the Lord of Hosts, that it shall leave them neither root nor branch.  But unto you that fear my name, shall the Son of Righteousness arise with healing in his wings; and ye shall go forth and grow up as calves in the stall.  And ye shall tread down the wicked; for they shall be ashes under the soles of your feet in the day that I shall do this, saith the Lord of Hosts.

"Remember ye the law of Moses, my servant, which I commanded unto him in Horeb for all Israel, with the statutes and judgments.

"Behold, I will send you Elijah the prophet before the coming of the great and dreadful day of the Lord; And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and smite the earth with a curse." (Christ, 3 Nephi 25)